B3105 2018 GMC Sierra Code - Keyless Entry Transmitters

This code specifically relates to a fault in the Keyless Entry Transmitters system of the vehicle.

Common symptoms include issues with the key fob not working, difficulty locking or unlocking the doors remotely, and potential problems with the vehicle's anti-theft system.

Potential causes include a malfunctioning key fob, a weak or dead battery in the key fob, faulty receiver unit in the vehicle, or wiring/connectivity problems between the key fob and the vehicle.

Start by checking the battery in the key fob, ensuring it has sufficient power. Try using a spare key fob if available to see if the issue is specific to one transmitter. Inspect the receiver unit in the vehicle for any visible damage.

Depending on the exact cause of the issue, some DIY repairs like replacing the key fob battery or reprogramming the key fob may be possible. However, more complex repairs involving the receiver unit or wiring should be done by a professional.

While the issue itself may not pose an immediate safety risk, having malfunctioning keyless entry transmitters can be inconvenient and potentially leave the vehicle vulnerable to theft.

The code itself is related to the keyless entry system and should not impact the vehicle's engine performance or drivability. However, resolving the issue is important for convenience and security reasons.

The cost of repairs can vary depending on the exact cause of the issue. Simple fixes like replacing a key fob battery may be inexpensive, while more complex repairs involving the receiver unit could be more costly.

While clearing the code may temporarily remove the warning light, it is important to address the underlying issue causing the code to prevent future problems with the keyless entry system.

While it may not be one of the most common OBDII codes, issues with keyless entry transmitters can occur in 2018 GMC Sierra vehicles, especially as the key fob and receiver unit age.